200523423 九、發明說明： L發明所屬之^技術領威】 本發明涉及一種用於縫紉機的緊線裝置。 I：先前技術3 5 在某些縫紉工作中，可能會出現在同一個/些縫料上製 作接縫時將交替地需要較高或較低的緊線度。這例如在縫 製凸起時發生，該凸起由交叉縫或附加插入在縫料中的條 狀物形成。在這種縫製工作中，將線的鬆緊度從一個預先 設定的可重複的值轉換到另一個值時必須盡可能地迅速並 10 不浪費時間。 DE 19753107C2描述了 一種缝匆機緊線裝置，其中若干 個緊線器可通過氣動驅動器控制，以在各個針線中産生不 同的緊線度。該緊線裝置的缺點在於必須提供壓縮空氣以 進行操作，而這不是每一個縫紉廠都能有的。而且，這種 15緊線裝置的結構複雜。 DE 2516639C3說明了一種緊線器，其具有一個電磁 鐵，借助該電磁鐵對抗預載入壓縮彈簧的壓力，以將夾持 針線的張力片彼此分開。在這種方法中，該緊線器可處於 針線繃緊的操作狀態和針線鬆開的操作狀態。這並不是本 20文開始所述問題的直接解決方案。 【發明内容】 本發明的目的是設計一種緊線裝置，其中通過簡單的 方式在一個針線中産生至少兩個不同的預設緊線值。 根據本發明，該目的在以下縫紉機緊線裝置中實現， 200523423 該裝置包括一個固定在縫紉機上的撐板；一個安裝在撐板 上的第一緊線器；一個安裝在撐板上的第二緊線器；一個 分配給每個緊線器以使對應的緊線器放鬆的鬆線銷；一個 可樞轉地安裝在樞轉支(承)座上的放鬆桿，其可順續地樞轉 5以抵靠第一緊線器的鬆線銷和第二緊線器的鬆線銷；一個 使放鬆桿繞軸以分開/離散的步驟；I：區轉以抵靠在第一緊線 為和弟二緊線裔、上的直線驅動機構。基於簡單的設計和不 複雜的結構，根據本發明的解決方案提供了使用雨個緊線 器並有選擇性地斷開（turn off)其中一個或兩個的可能性。 10 當然，根據本發明可設想使用三個串聯的緊線器。 利用每個縫幼機的中存在的電源供給，當直線驅動機 構是一電磁鐵時將獲得一個特別簡單的傳動解決方案，其 中給電磁鐵配置一個控制系統以用於不同的電流通量 (currem flux)。當控制系統設計爲使放鬆第_和第二緊線= 的電流通量超過放鬆第一緊線器的電流通量的兩倍時，： 可能獲得一種特別簡單的控制。 、 …仏且丁❿真尔外益的符別簡單的設計是通 過將第二緊線H置於比第—緊線驗放鬆桿的樞轉支座的 輯更遠的位置來實現。存在這樣—種改進，即在放轉 k與第-緊線器的鬆線銷接觸的位置樞轉到 的鬆線銷接觸的位置的轉動行程中設置—個二f: 克服的切換阻擔，該改進排除了在只有第=由放鬆桿 開時兩個緊線器的任何無意的鬆開。爲此，在更= 改進中切換陶t是由_個有折彎部分的彈簧片形成。乂、 20 200523423 器 其中放鬆桿具有可人工作業的手柄的改進使第一緊線 或者兩個緊線器在必要時可由人工鬆開。 這種緊線器通常設計爲可以具有可調整的可以由鬆線 銷消除的預載荷。 5 10 15 圖式簡單說明 本發明的具體細節將在隨後的本發明實施例的描述中 得到清楚的說明，其中： 第1圖是包括一緊線裝置的縫紉機示意圖； 第2圖是放大比例的緊線裝置的視圖； 第3圖是按比例放大的與第2圖相對的沿第2圖中Hun 的緊線裝置的垂直截面圖； 第4圖是包括控制直線驅動機構的控制系統的緊 置的示意圖。 衣 C實施方式】 圖中所示的勒機通常包括外殼形式的基板i、頂臂2 和連接它們的立柱3’它是C形的。_個臂轴4裝在頂臂]中， 利用-個曲柄機構致動具有針6的針桿5。臂軸4的致動由」 =動馬達㈣峨行…健針6相配合_梭被安放 隹基板1中，鈎梭的致動由臂軸4進行。 -個從針線供給裝置（未示出）中送進針_的緊_ 以在與縫_操作者側7相對應的側壁8上。針線忉通 ^裝置9被引入慣用的挑線_，並從那裏到達針6。 緊線裳置9包括以-定距離支撺在側壁8上且由螺釘μ 固疋在其上的揮板12。—預緊器16、_第二緊線器Η、一 20 200523423 第一緊線器18和一轉向器19在針線10的對應於進線方向i5 的途徑上設置在撐板12上。常規設計的預緊器16非常輕微 地預緊通過它的針線10，這種預緊主要確保針線1〇確定地 進給到緊線器17、18上。真正的緊線操作發生在將在下面 5詳細說明的緊線器17、18中。將針線1〇從緊線裝置9偏引向 挑線桿11是通過安裝在轉向器19上的支腳彈簧2〇實現的， 它作爲一種緩衝器可以可靠地補償挑線桿i i的任何運動學 誤差。 兩個緊線器17、18是完全相同的。每一個都具有安裝 10在撐板12上朝向操作者側7伸出的支撐螺栓21。朝向操作者 側7的自由端在一螺紋23上設有一個調節輪22,因此輪22在 螺栓21的縱向方向上是可調節的。此調節輪22裝有一個與 该螺紋23接合的塑膠環24，它作爲一個自鎖機構可以克服 調節輪22的任何無意旋轉。 15 一對張力片25、26可移位地安裝在螺栓21上，針線10 在其間被引導。一張力片25支承在撐板12上。一壓板27在 螺栓21的縱向上可移動地安裝於螺栓21上，並貼靠在遠離 樓板12的張力片26上。壓板27在螺栓21的槽28中不能轉動 但可以縱向移動地被引導。一個圓錐形的壓縮彈簧29被置 20於調節輪22和壓板27之間，它的預載荷可以通過旋轉調節 輪22來調整。彈簧29將壓板27壓在張力片26上，而張力片 又壓靠在張力片25上，這樣在在張力片25、26之間通過的 針線10上作用_些摩擦力和由此産生的制動力，其作用程 度取決於壓縮彈簧29的預載荷。一鬆線銷30抵靠壓板27， 200523423 並從面向側壁8的一側穿過螺栓21，以使鬆線銷3〇在朝向壓 板27的方向上向螺栓21的任何推入動作均可將壓板27抬離 張力片26，從而取消壓縮彈簧29的預載荷。然後針線1〇幾 乎無摩擦地從張力片25、26之間穿過。 5 放鬆桿31可轉動地在背離操作者側7的一側，即在側壁 8和撐板12之間安裝在撐板12上。爲此，提供了兩個螺釘 32，其置於撐板12和放鬆桿31的底邊附近處，每一個都由 間隔套33包封，它們組成了放鬆桿31的樞轉支座。在螺釘 32附近放鬆桿31和撐板12之間，安裝了一個橡膠環作爲重 10定彈簧34,其將放鬆桿31恢復到按照第3圖所示的轉向側壁 8的位置。當放鬆桿31向撐板12的方向樞轉時，它首先抵靠 第一緊線器18的鬆線銷30，當繼續樞轉時，將抵靠第二緊 線器17的鬆線銷30。 放鬆桿31由直線驅動裝置35操縱，該裝置包括一個安 15裝在臂2内側壁8上的電磁鐵36 ;其推桿37穿過側壁8上的孔 38，並以距由螺栓32形成的放鬆桿31的回轉支座的淨距離 抵靠在放鬆桿31上。偏離其底座的放鬆桿31的頂側具有手 柄39，可通過它手動操作手柄31。利用螺栓41，一彈簧片 42被安裝在形成於臂2内的側壁8上的支座4〇上並通過側壁 2〇 8内的通道43伸向撑板12。彈簧片42有一個折彎部分44，支 靠在桿31的定位區域45上。折彎部分44以這樣的方式佈 置，即在第二緊線器17的鬆線銷30被推入之前，桿31的定 位區域45將靠在該折彎部分44上。因而，彈簧片42和它的 折％部分44構成了放鬆桿31必須在其接觸到第二緊線器I? 200523423 的鬆線銷3〇以前克服的切換阻擔。 士第4圖中所示，電磁鐵％包括一個繞線線圈ο，其裏 面放置有通過電流而被致動時可缩回至繞線線圈47中的鐵 〜48鐵心48包括推桿37’當鐵芯48縮回線圈们中時推桿 5 37被朝向放鬆桿31推出。 姻工制系統49進行電流供應從而控制電磁·6的繞 線線圈47,利用-個脈衝寬度調製器5()和隨後的放大器 51 ’控制系統49產生由不同時間間隔形成的矩形波信號形 f的直流電流。通過控㈣、統49_擇器52、53進行操作， 1〇第「個選擇器52控制作用於推桿37上的放鬆力至使緊線器 18被鬆開的程度，從而消除第_緊線器18作用於針線^ 的摩擦力。選擇益53控制線圈47的全電流通量以使放鬆桿 31首先推入第-緊線器18的鬆線銷3〇，然後克服切換阻^ 46阻力’再推入第二緊線器17的鬆線銷，然後η、μ兩 15個緊線器就都被鬆開。這種線張緊載荷近乎完全的消除在 縫切操作過程中不需要’但經常在縫製工作的最後階：， 即=縫料和針線10必須從針6下面移走時需要。只要電^ 又有被激勵’由緊線器17、18施加的組合拉緊載荷就 用於針線10上。向電磁鐵36通人則、的電流將僅消除200523423 IX. Description of the invention: [Technical power of L invention] The present invention relates to a thread tightening device for a sewing machine. I: Prior art 3 5 In some sewing jobs, it may occur that when making seams on the same sewing material (s), higher or lower tightness is required alternately. This occurs, for example, when sewing protrusions, which are formed by cross stitching or by strips inserted additionally in the sewing material. In this kind of sewing work, the tightness of the thread must be changed as quickly as possible from one preset repeatable value to another without losing time. DE 19753107C2 describes a sewing machine thread tightening device in which several thread tensioners can be controlled by pneumatic drives to produce different thread tightness in each needle thread. The disadvantage of this thread tightening device is that compressed air must be provided for operation, which is not available in every sewing factory. Moreover, the structure of such a 15-thread tightening device is complicated. DE 2516639C3 describes a thread tensioner having an electromagnetic iron, by means of which an electromagnet resists the pressure of a preloaded compression spring in order to separate the tension plates holding the needle thread from each other. In this method, the thread tensioner can be in an operation state in which the needle thread is tightened and an operation state in which the needle thread is released. This is not a direct solution to the problem described at the beginning of this article. SUMMARY OF THE INVENTION The object of the present invention is to design a thread-tightening device in which at least two different preset thread-tightening values are generated in a needle thread in a simple manner. According to the present invention, this object is achieved in the following thread tightening device of a sewing machine, 200523423 The device includes a support plate fixed on the sewing machine; a first thread tightener installed on the support plate; a second thread tightener installed on the support plate; Thread tensioner; a slack pin assigned to each thread tensioner to relax the corresponding thread tensioner; a slack lever pivotably mounted on a pivot support (bearing) seat, which can be continuously pivoted Turn 5 to abut the slack pin of the first tensioner and the slack pin of the second tensioner; a step to separate / discrete the release lever around the shaft; I: zone turn to abut the first tensioner It is a linear drive mechanism that is tightly lined with the younger brother. Based on a simple design and an uncomplicated structure, the solution according to the invention provides the possibility of using a thread tensioner and selectively turning off one or both of them. 10 Of course, it is conceivable according to the invention to use three thread tensioners in series. With the power supply present in each sewing machine, a particularly simple transmission solution is obtained when the linear drive mechanism is an electromagnet, in which the electromagnet is equipped with a control system for different current fluxes (currem flux) ). When the control system is designed in such a way that the current flux of the first and second tensioners = more than twice the current flux of the first tensioner: A particularly simple control may be obtained. The simple design of Ding Yizheng Waiyi is achieved by placing the second tight line H farther than the series of pivot supports of the first-tight line test release lever. There is such an improvement that it is set in the rotation stroke of the position where the position where k comes in contact with the loose pin of the first tensioner is pivoted to the position where the loose pin contacts, a second f: overcome the switching resistance, This improvement eliminates any unintentional release of the two tensioners when only the third lever is opened by the release lever. For this reason, in the more improved, the switching pottery t is formed by a spring leaf with a bent portion.乂, 20 200523423 The improvement in which the release lever has a manually operable handle allows the first tensioner or the two tensioners to be manually released when necessary. Such tensioners are usually designed to have adjustable preloads that can be eliminated by a loosening pin. 5 10 15 Brief description of the drawings The specific details of the present invention will be clearly explained in the following description of the embodiment of the present invention, in which: FIG. 1 is a schematic view of a sewing machine including a thread tightening device; FIG. 2 is an enlarged scale View of the thread tightening device; FIG. 3 is a vertical cross-sectional view of Hun's thread tightening device, which is enlarged in proportion to FIG. 2 and opposite to FIG. 2; FIG. 4 is a tightening of a control system including a linear drive mechanism Schematic. Clothing C Embodiment] The machine shown in the figure generally includes a base plate i in the form of a housing, a top arm 2 and a post 3 'connecting them, which is C-shaped. The arm shaft 4 is mounted in the top arm], and a needle bar 5 having a needle 6 is actuated by a crank mechanism. The actuation of the arm shaft 4 is performed by the "moving motor Saga line ... the needle 6 cooperates_the shuttle is placed. In the base plate 1, the actuation of the hook shuttle is performed by the arm shaft 4. A tightly fed needle is fed from a needle thread supply device (not shown) to the side wall 8 corresponding to the sewing_operator side 7. The needle thread is opened ^ The device 9 is introduced into the conventional thread take-up device and reaches the needle 6 from there. The tight-line dress 9 includes a swinging plate 12 supported on the side wall 8 at a fixed distance and fixed thereto by a screw μ. —Pretensioner 16, _Second tensioner 一, One 20 200523423 The first tensioner 18 and a diverter 19 are provided on the support plate 12 on the path of the needle thread 10 corresponding to the thread entry direction i5. The conventionally designed pretensioner 16 pre-tensions the needle thread 10 very slightly. This pre-tensioning mainly ensures that the needle thread 10 is surely fed onto the thread tensioners 17,18. The actual thread tightening operation takes place in the thread tensioners 17, 18 which will be described in detail below 5. The needle thread 10 is deflected from the thread tightening device 9 to the thread take-up lever 11 by using a foot spring 20 installed on the steering gear 19, and it can reliably compensate any kinematics of the thread take-up lever ii as a buffer. error. The two thread tensioners 17, 18 are identical. Each has a support bolt 21 mounted on the stay 12 and protruding toward the operator side 7. The free end facing the operator side 7 is provided with an adjusting wheel 22 on a thread 23 so that the wheel 22 is adjustable in the longitudinal direction of the bolt 21. The adjusting wheel 22 is provided with a plastic ring 24 engaged with the thread 23, which acts as a self-locking mechanism to overcome any unintentional rotation of the adjusting wheel 22. 15 A pair of tension pieces 25, 26 are displaceably mounted on the bolt 21 with the needle thread 10 guided therebetween. A tension piece 25 is supported on the stay plate 12. A pressure plate 27 is movably mounted on the bolt 21 in the longitudinal direction of the bolt 21 and abuts on a tension piece 26 far from the floor plate 12. The pressure plate 27 is not rotatable in the groove 28 of the bolt 21 but is guided in a longitudinally movable manner. A conical compression spring 29 is placed between the adjustment wheel 22 and the pressure plate 27, and its preload can be adjusted by rotating the adjustment wheel 22. The spring 29 presses the pressure plate 27 against the tension plate 26, and the tension plate presses against the tension plate 25, so that some frictional force and the resulting system are exerted on the needle thread 10 passing between the tension plates 25 and 26. The degree of power depends on the preload of the compression spring 29. A loosening pin 30 abuts against the pressure plate 27, 200523423 and passes through the bolt 21 from the side facing the side wall 8 so that any push-in action of the loosening pin 30 toward the bolt 21 in the direction toward the pressure plate 27 can push the pressure plate 27 lifts off the tension plate 26, thereby cancelling the preload of the compression spring 29. The needle thread 10 then passes between the tension pieces 25, 26 almost without friction. 5 The release lever 31 is rotatably mounted on the stay 12 on the side facing away from the operator side 7, that is, between the side wall 8 and the stay 12. To this end, two screws 32 are provided, which are placed near the bottom edge of the stay 12 and the release lever 31, each of which is enclosed by a spacer sleeve 33, which constitutes a pivot support of the release lever 31. Between the release lever 31 and the stay plate 12 near the screw 32, a rubber ring is installed as a weight fixing spring 34, which restores the release lever 31 to the position of the steering side wall 8 as shown in FIG. When the release lever 31 pivots in the direction of the stay 12, it first abuts against the loosening pin 30 of the first tensioner 18, and when it continues to pivot, it will abut against the loosening pin 30 of the second tensioner 17. . The release lever 31 is operated by a linear drive device 35, which includes an electromagnet 36 mounted on the inner side wall 8 of the arm 2; its push rod 37 passes through a hole 38 in the side wall 8 and is formed at a distance from the bolt 32 The clear distance of the swivel support of the relaxation lever 31 abuts on the relaxation lever 31. The top side of the release lever 31 off the base has a handle 39 by which the handle 31 can be manually operated. With the bolt 41, a spring piece 42 is mounted on a support 40 formed on the side wall 8 in the arm 2 and extends to the stay 12 through a channel 43 in the side wall 208. The spring piece 42 has a bent portion 44 which rests on the positioning area 45 of the rod 31. The bent portion 44 is arranged in such a manner that the positioning area 45 of the lever 31 will rest on the bent portion 44 before the loosening pin 30 of the second thread tensioner 17 is pushed in. Thus, the spring piece 42 and its fold-down portion 44 constitute a switching resistance that the slack lever 31 must overcome before it contacts the slack pin 30 of the second tensioner I 200523423. As shown in FIG. 4, the electromagnet includes a winding coil. Inside it is placed an iron that can be retracted into the winding coil 47 when it is actuated by a current. The iron core 48 includes a push rod 37 ′ when When the iron core 48 retracts the coils, the pusher 5 37 is pushed out toward the release lever 31. The work system 49 supplies current to control the winding coil 47 of the electromagnetic · 6. A pulse width modulator 5 () and a subsequent amplifier 51 are used to control the system 49 to generate a rectangular wave signal shape f formed at different time intervals. DC current. By controlling the selector 49 and selectors 52 and 53, the 10th selector 52 controls the relaxation force acting on the push rod 37 to the extent that the tensioner 18 is released, thereby eliminating the tension The thread 18 acts on the frictional force of the needle thread ^. The benefit 53 is selected to control the full current flux of the coil 47 so that the release lever 31 is first pushed into the loosening pin 3 of the first thread tensioner 18 and then overcomes the switching resistance ^ 46 resistance 'Push in the loosening pin of the second tensioner 17, and then both 15 and tens of tensioners η and μ are loosened. This kind of thread tension load is almost completely eliminated and is not required during the slitting operation.' But often in the last stage of the sewing work: ie = sewing material and needle thread 10 must be removed from underneath the needle 6. As long as electricity ^ is excited again, the combined tension load applied by the thread tensioners 17, 18 is used On the needle thread 10. The current flowing to the electromagnet 36 will only be eliminated
20緊線盗18的拉緊載荷，而第二緊線器”的拉緊載荷則繼錄 作用於針線10上。 A 兩個選擇器52、53釋放的電流的大小可這樣設定 传對於給定的完全相同的緊線器17、18的設計和尤其是 樣尺寸的壓縮彈簧29，全電流通量時作用於兩個鬆線鎖30 200523423 上的載荷是作用於第一緊線器18的鬆線銷30上的載荷的兩 倍。 【圖式簡單說明】 第1圖是包括一緊線裝置的縫紉機示意圖； 5 第2圖是放大比例的緊線裝置的視圖； 第3圖是按比例放大的與第2圖相對的沿第2圖中III-III 的緊線裝置的垂直截面圖； 第4圖是包括控制直線驅動機構的控制系統的緊線裝 置的示意圖。 10 【主要元件符號說明】 1...基板 16…預緊器 2.··頂臂 17...第二緊線器 3...立柱 18…第一緊線器 4...臂軸 19.··轉向器 5...針桿 20…支腳彈簧 6···針 21...支撐螺栓 7...縫紉機操作者側 22…調節輪 8...側壁 23···螺紋 9...緊線裝置 24...塑膠環 10...針線 25···張力片 11...挑線桿 26…張力片 12…撐板 27…壓板 14…螺釘 28···槽 15...進線方向 29…壓縮彈簧 11 200523423The tightening load of 20 tightener 18, and the tightening load of "second tightener" is then recorded on the needle thread 10. A The amount of current released by the two selectors 52, 53 can be set in this way for a given The design of the identical thread tensioners 17, 18 and especially the compression spring 29 of the same size, the load acting on the two wire locks 30 at the full current flux is 200523423. Twice the load on the thread pin 30. [Brief description of the drawing] Figure 1 is a schematic view of a sewing machine including a thread tightening device; 5 Figure 2 is an enlarged view of the thread tightening device; Figure 3 is an enlarged scale A vertical cross-sectional view of the thread tightening device taken along line III-III in FIG. 2 opposite to FIG. 2; FIG. 4 is a schematic view of the thread tightening device including a control system for controlling the linear drive mechanism. 1 ... substrate 16 ... pretensioner 2 .... top arm 17 ... second tensioner 3 ... post 18 ... first tensioner 4 ... arm shaft 19 .... steering device 5 ... needle bar 20 ... foot spring 6 ... needle 21 ... support bolt 7 ... operator side 22 of the sewing machine ... adjustment wheel 8 ... side wall 23 ·· Thread 9 ... Tightening device 24 ... Plastic ring 10 ... Needle thread 25 ... · Tension piece 11 ... Thread take-up lever 26 ... Tension piece 12 ... Support plate 27 ... Press plate 14 ... Screw 28 · ·· Slot 15 ... Feeding direction 29 ... Compression spring 11 200523423
3CL·.鬆線銷 42...彈簧片 31…放鬆桿 43...通道 32…螺釘 44…折彎部分 33...間隔套 45...定位區域 34...重定彈簧 46…切換阻擋 35...直線驅動裝置 47…繞線線圈 36…電磁鐵 48...鐵芯 37…推桿 49…控制系統 38...孔 50...脈衝寬度調製器 39...手柄 51...放大器 40...支座 52…選擇器 41…螺栓 53…選擇器3CL .. Loose pin 42 ... Spring piece 31 ... Release lever 43 ... Channel 32 ... Screw 44 ... Bent portion 33 ... Spacer sleeve 45 ... Positioning area 34 ... Reset spring 46 ... Switch Stop 35 ... linear drive 47 ... winding coil 36 ... electromagnet 48 ... iron core 37 ... push rod 49 ... control system 38 ... hole 50 ... pulse width modulator 39 ... handle 51 ... amplifier 40 ... support 52 ... selector 41 ... bolt 53 ... selector
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